[Alt-photo] Re: Was Sulfamic Argyrotype and toning

[Sandy King]

Loris,

If you tone a vandyke or argyrotype print to completion with a gold thiourea toner the deepest shadows should have a distinctive bluish-black color. If the tone that remains is slightly reddish/magenta/purplish the toner has not done its job. The toner may be weak, or you might need to use more of it. 

I have noticed that some of the my batches of gold thioura toner do not seem to work as effectively  as in the past and have wondered what could be the cause. It would seem that the gold chloride, distilled water and salt would remain stable, wonder if the chemical thiourea goes bad?

Sandy


On May 15, 2013, at 3:50 AM, Loris Medici wrote:

> Hi Marek they look nice, thanks for sharing. The result with gold toner
> look very much like what I get; somehow, you can't totally neutralize the
> warmth in the deepest shadows - a very dark and slight reddish / magenta
> tint remains...
> 
> Regards,
> Loris.
> 
> 
> 2013/5/15 Marek Matusz <marekmatusz at hotmail.com>
> 
>> 
>> 
>> A few examples of argyrotypes on Rising Stonehendge paper treated with
>> sulfamic acid. Untoned print also gold and platinum toning examples
>> https://plus.google.com/photos/105732508998271877151/albums/5878024532012592449?authkey=CMaWrqn036yO6AE  Marek
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